New hi-speed project

This is going to be good! I'd say 1521 is a good choice, and I wouldn't spin it slower than 50k RPM! Aim for 60k at nominal voltage as I think at full tap your pack will probably drop below 3.7V/cell anyway.

A car like this is probably going to need about 4 kW of power.

[ssspconcepts]

Brian,

This should really be a cool project! I can't wait to see what you come up with as an end product. I have been eyeballing the Ultra GTP for a long time and have been considering a similar build....except I wouldn't be going for the extreme high speeds that you are. What motor mount would you use-the CR buggy?